One day, 16-year-old high school girl Mizumoto Momoko is suddenly caught up in the summoning of a war god and transported to another world. "Waaaah!" She suddenly realizes that she is surrounded by handsome guys... and she has become a 5-year-old! Momoko has become a fake little girl with the body of a 5-year-old and the mind of a 16-year-old, but she decides to live in the other world as "Momo". A life of doting love begins with three handsome guys: the prince Bal, the cool beauty Kiruma, and the host Kai!